Floor tiles, problem substrate?

Hello everyone,

after purchasing a house, floor tiles were supposed to be laid in one room - previously there was a carpet here. In one corner of the screed floor (corner of the door passage), unfortunately, a pipe of the underfloor heating is now laid up to the surface of the screed. The spot is about 10cm long.

Does anyone have an idea how such a spot could possibly be "stabilized"?

Since an old channel was filled with concrete elsewhere in the room, a decoupling mat is used in the room - but this alone is unlikely to provide much stability at the above-mentioned corner...

Thanks and best regards Jens

Hello Jens. The topic you are addressing here is likely to overwhelm the majority of participants in terms of their expertise. One could give an answer to your question, but one should not if one has not seen the object. If it were actually the case, which I really cannot imagine, that a heating element was installed directly just below the screed surface, then there is nothing to stabilize! The screed would be weakened at this point due to a notch in the cross-section, which would affect the load-bearing capacity. This is a matter for an expert who must examine the problem on-site and only then decide whether the area can be saved or not. I am only warning here against accepting general opinions that may want to downplay the problem! If it really is as you describe, then no do-it-yourselfer with "grandma’s remedies" can offer a real solution. Photos would have been helpful at this point! ------------------- Regards: KlaRa

Of course, there are ways to cut or chisel open the area around and under the heating pipe and resin it with mesh. A second possibility would be to mill a expansion joint at this spot and in the corresponding directions afterward to create a predetermined breaking point, which would then have to be covered at the top with a strip. It just looks damn bad.

Show me a photo